Name: GPS Position (LLA, UTM, USNG, MGRS, QTH, & more)
Rating: 3.8 (190 reviews)
Author: magmiles

Simple app to display current position information in a variety of different formats:
* Lat/Long in Degrees
* Lat/Long in Degrees/Mins
* Lat/Long in Degrees/Mins/Secs
* UTM (WGS84)
* USNG (WGS84)
* MGRS (WGS84)
* QTH Locator (Maidenhead / IARU)
* UK Grid (OSGB36)
* Swiss Grid (LV95)
* Swiss Grid (LV03)
* SK-42 (Degrees) [BETA]
* SK-42 (Orthogonal) [BETA]
* LKS-92 Grid

Color of position text indicates GPS signal strength. Color of battery text indicates battery life. UTM/USNG/MGRS positions are using NAD83/WGS84 datum, UK Grid (Ordnance Survey National Grid) positions is using OSGB36 datum.

***NOTE: GPS must be turned on first by going to Settings - Sensors - GPS

Tested on simulator for all supported devices and on Forerunner 55 and vivoactive hardware. Please comment with any bugs/enhancement requests and rate 5 stars if you find the app useful!

Widget version also available: https://apps.garmin.com/en-US/apps/d46d47fe-57b9-45ab-b4cd-c12f499be97e

Changelog:
3.4.0 - Updated GPS logic. Added support for Instinct 3 series.
3.3.2 - Added LKS-92 format.
3.3.0 - Added Ranger mode to display UTM/MGRS, decimal degrees, and time.
3.2.0 - Added support for Edge/Handheld devices.
3.1.5 - Degree symbol display fix.
3.1.4 - Added SK-42 formats [BETA].
3.1.1 - Better GNSS constellation support.
3.1.0 - Added Swiss grid. Major refactor/cleanup.
3.0.9 - Added Maidenhead Locator/QTH Locator/IARU Locator. Heading now displays in mil in MGRS mode.
3.0.7 - Refactored out GPS formatting into separate class.
3.0.6 - Changed storage mode to work with CIQ 4.0.0 and above.
3.0.5 - Added progress dots animation.
3.0.4 - Added support for additional devices.
3.0.0 - Added support for MANY more devices! Cleaned up layout to work better on more devices.
2.6 - Added support for vivoactive HR and Forerunner 735XT! Minor adjustments to layout.
2.5 - Making MGRS use the same logic as USNG since they have the same datum and should be equivalent.
2.4 - Added support for Forerunner 230, Forerunner 235, and Forerunner 630. Fixed southern hemisphere bug with UTM (thanks simonw42 and LeongSC!).
2.3 - Current speed now respects device distance unit setting (statue displays mph, metric displays km/h).
2.2 - Current position format is now maintained between launches. Thanks to hoanBK for the suggestion!
2.1 - Added UK Grid Reference (Ordnance Survey National Grid) support.
2.0 - Added support for round watches (D2 Bravo and fenix 3), and ForeAthelete/Forerunner 920XT! Rearranged the UI to make the coordinate data bigger. Removed "Fix" field. 
1.9 - Added UTM and USNG formats and fixed MGRS (there seems to be a bug in the ConnectIQ API for converting position to MGRS so I implemented the conversions myself). Thanks to Drewing for pointing this out!
1.8 - Cleaned  up  icon
1.7 - Added epix support
1.4/1.5/1.6 - GUI fixes
1.3 - Added battery indicator
1.1/1.2 - GUI fixes
1.0 - Initial release